Machine for use in the manufacture of shoes



Nov. 1e, 1947. R. H. LAWSON 2,430,880

MACHINE FOR USE IN THEl MANUFACTURE SHOES Nov. 18, 1947. i R. H. LAWSON 2,430,880

` MACHINE-FOR USE IN THE MANUACTURE OF SHOES 6 Sheets-Sheet 2 Filed June 28', 1944 Nov. 18, 1947. R. H. L AwsoN MACHINE FOR USE 1N THE VMANUF'CTURE `OF SHOES e shams-sheet 5 Filed June 28, 1944 Innen for Robe/" Hinzu/Jon Nov. 18, 1947. R. H. LAWSON 2,430,880

MACHINE FOR USE IN THE MANUFACTURE OF SHOES 'Filed June 2S, 1944 e sheets-sheet 4 fnl/enfui RoberHLaLz/Jon VTTT ' Nov. 18, 1947. I R. H. LAWSON 2,430,880 .MCHINEFOR USE 1N THE MANUFACTURE oF SHOES' v v Filed June 28. 1944v e sheets-sheet 5 Y 7 :II-Iz? //0/ l Wgj a n ven for R0 berz Elan/.san

B fle Nov. 18,1947. R. H. ,LAWSON 2,430,880

MACHINE FOR USE IN THEMANUFACTURE 0F `SHOES Filed vJune 28, 1944 6 sheets-sheet e /J v 'I V 'z Vf@ 1 k i L #WFP LI l i l 76 e g I l J 1 a /00 [n1/enla RoberELau/Jon Patented` Nov. 18, 1947 MACHINE FOB USE IN THE MANUFACTURE OF SHOE@ Robert Lawson, Beverly, Mass., assignor 'to United Shoe'Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application June 2,8, 1944, Serial No. 54%,5945

23 Claims.

The present invention relates -to maohines for use in the manufacture o f shoes, and more Particularly to mahines which ,cornpnise in their` or.- ganization devices vfor performing an operation progressively along the bottom margin of a shoe, a shoe supporting look and rr1eohanisrri for controlling the relative positions of the jack and operating devices as the `point of operation of said devices is transferred along the slice, .the invention being :herein disclosed as embodied vin and in. tended as lan improvement of automatic side lastin g machines such as disclosed in various United States Letters Patent, including United `States Letters Patent No- .2,25225, granted August 12, 194,1; `No. 2,247,443, granted July l, 1941,; and No. 2,201,866, ,granted May 21, 1940, all upon .aps iI lalications filed in the name of the present invenE The jack disclosed in inventors Patent No, 2,201,866 has a frame connected by ,a substantially horizontal link with avertioel erm nivotally connected with a movable jack base comprising fa follower erin actuated by o pattern @am for imparting longitudinal pitching or tipping move.- rnents to the shoe on the lack about an exis-pass- 111,5 through the plane of the shoe bottom at the point of operation transversely to the length of the shoe. The machine is prot/,idoli with lasting units ,having presser feet engaging .the `loottom of the .ShOe at eh Sitio of the shoe and, in. order to `insure equal pressures on the presser feet, the means tor supporting the shoe is ,carried in a cradle pivotally mounted in the frame yof the jack about y an axis extending lengthwise of the shoe, thus permitting rolling or rocking movement of the shoe about the lengthwise axis. The arrangement of the leek and the operating means therefor in the patented machine is effective for the purposes intended when a `rnans shoe hav- .ioe a relatively llat bottom suriaoe is beine lasted but, with a womens style lliehferoh shoe, so ,much pitching movement is required in the jack frame order to present the Shoe bottom pron erly to the lasting units `that a earn :for producing these movements will have a curvature of an .eX- -eessirelry steep inclination, .and ,the parts of the iaols .including the arr-,n :and-the frame will be inclined to such a degree with relation to each other thatthedesired:pressures will not be maintained (ci, ie-s) on the presserieet, and other difficulties may arise ,due to mechanicaldsarransement oi the parts.

tilemaoliine embodying tbe present invention, little or no relative angular movements are required between the jack .frame and its supportine while lasting womens style shoes, or ai least no greater .movements than with mens .style Shoes liar/,ine relatively flat bottom suriaoes, the shoe supporting means not beine. carried directly .the oreille but in a Seperate oorrlose Wllloll, in torn, ls .mounted in tlie Cradle for .relative pitching movement of the .shoe about an. extending Wisthwlse of ,the .snoe- Suitalole movements are imparted tothe carriage relatively to the cradle @lutins operation on tlie ,shoe while the lasting units ore operaties alone the ball portion of the shoe, so that the angular relation of the look frame and itssiipoortine arm may .be `nieliritarieel without substantiel change, or at least with no 2o more thones; Whileopeiatirle upon a womans style slioe bovine a hish arch than uson a mans shoe bovins a relatively .flat bottom surfeoethis feature o f the invention, the mechanism for shifting Vthe ,carriage is driven from a cam sliat mounted ,in the lack .frame As 'llas ,been stated, the principal :movement of the earriagein the jack cradle occurs while operr ating upon the ball Portion of .e Womens style shoe between the shank and forepart. Along other portions of the shoe, pitching movements are necessary only to the extent corresponding to those required in amans style shoe, so that such Inovements may betaken care of readily by a pitch earn of a shape formerly employed in the patented maelaine.V "To linsure that no relative movements between the carriage and the cradle will occur at times other than While the ball `portion of a Womans shoe is being operated upon, tine mechanism for shifting the carriage in the cradle includes disconnectible connections driven lfrom the cam shaft and -rneans for connecting said connection-s while the ball portion of a shoe is being operatedfupon and for disconnecting and locking the connections thereafter. In one form of this feature,-the means for causing the disconnectible connections to be connected and disconnected includes a crank driven `by the earn shaft.

`The shoe supporting means of the patented niacliine consists of a last pin Aand a, toe rest, the last pin beingmounted upon a slide movable toward and from the toe rest and urged yieldingly toward the toe rest to clamp a shoe on the supporting means. In order to maintain the supporting means in readiness to receive a shoe, the last pin slide is, as usual, releasably held away from the toe rest, and in the patented machine the last pin has slidably mounted on it a depressible plunger actuated While a shoe is being applied to the jack to release the jack pin slide for clamping movement toward the toe rest. Actuation of the plunger while applying a, shoe to a jack of the type referred to may require excessive effort on the part of the operator or the actuating mecha,- nism may be strained excessively on account of the force frequently applied to the shoe in actuating the slide releasing plunger.

Accordingly, a further feature of the present invention resides in a tripping lever for the shoe clamping means mounted directly in the jack frame and having a handle portion located in line with the axis about which the cradle pivots in the frame. With this arrangement, the operator in applying the shoe to the jack may grasp the shoe conveniently and actuate the tripping lever without exerting excessive effort and, at the same time, the shoe may easily be guided during its movement with the last pin toward the toe rest, the parts of the jack taking naturally their proper positions while presenting the shoe to the lasting units.

In the machine of the present inventors earlier Patent No. 2,201,866, mechanism is provided for exerting an upward raising pressure on the jack during operation on a shoe and for lowering the jack at the end of the operation, which comprises a spring and a toggle, the spring being rendered inoperative and locked out of operation by straightening the toggle. The movement of the toggle to straightened position lowers the jack and is accomplished through connections including a pattern cam actuated lever. Due to the nature and general arrangement of the machine, the jack lowering movement must be imparted rapidly during a relatively small number of degrees of rotation of the pattern cam. On account of the weight of the jack and the connected parts, rapid movement of the toggle to straightened position causes an objectionable degree of shock and jar from reaction produced by stopping the lowering movement of the jack. To overcome this diiiiculty in the machine of said Patent No. 2,247,443, the toggle has a dashpot connected to it arranged to resist movement of the toggle as it approaches straightened position, thereby delaying the lowering time of the jack and absorbing shock and jar at the end of a lasting operation.

An important object attained in the construction embodying the present invention, therefore, is to avoid the necessity of employing a dashpot connected to the toggle as in the machineof Patent No. 2,247,443 and, generally, to improve the operation of the jack and its actuating mechanism of that machine. A feature of the invention, accordingly, consists in the use of novel and improved means, separate from the jack raising spring employed in the patented machine, for counterbalancing the weight of the jack substantially to avoid shock and jar in the toggle and its actuating mechanism of the machine.

Another feature of the invention, contributing to the attainment of the above objects relates to a loose joint in the connections through which the 'jack raising spring acts, the counterbalancing means enabling the jack tomove relatively to the 4 toggle slowly for a short distance after the toggle is straightened without subjecting the toggle to undesirable shock or jar.

These and other features of the present invention, including novel cam means on the operating shaft for increasing and diminishing the pressure of the shoe on the operating devices, will be readily understood by those skilled in the art from the following specic description taken in connection with the accompanying drawings in which is illustrated so much of an automatic side lasting machine as is necessary to show the improvements and connections oi the present invention therewith.

Referring to the drawings,

Fig. 1 is a view in side elevation, looking from the left, of a machine embodying the present invention, with the side of the frame broken away and in section to show the underlying parts;

Fig. 2 is a view in front elevation, on an enlarged scale, of the shoe supporting jack and the disconnectible connections of its actuating mechanisms, with the parts unlocked and in connected positions, assumedjust after the start of the lasting operations:

Fig. 3 is a detail view of the disconnectible carriage actuating connections while the parts are in the positions assumed at the end of a lasting operation with the connections locked;

Fig. 4 is a perspective view on an enlarged scale of the carriage actuating connections in locked positions at the beginning of a lasting operation;

Fig. 5 is a view in elevation, partly broken away, of the jack frame and the carriage actuating connections with the parts in locked positions at the beginning of an operation;

Fig. 6 is a view in side elevation, looking from the right, of the upper portion of the jack illustrated in Fig. 5;

Fig. 7 is a detail sectional view, on an enlarged scale, of the cam shaft for actuating the carriage mechanism, taken along the line VII-VII of Fig. 5:

Fig. 8 is a perspective view of a portion of the cam shaft;

Fig. 9 is a plan view, on an enlarged scale, of a portion of the carriage actuating connections and the controller therefor;

Fig. 10 is a view in side elevation of the same parts;

Fig. 11 is a detail plan view of the hooked disconnectible element of the connections; and

Fig. 12 is a perspective view of certain of the jack raising connections.

The automatic side lasting machine illustrated in the drawings is the same, except as hereinafter described, as the machine disclosed in in ventors prior patents hereinbefore referred to.V

Referring more particularly to Fig. 1 of the drawings, the lasting units of themachine are provided with upper gripping, tensioning and staple driving devices and are generally indicated at 2, the operating cam shaft at 4, and the pattern cams at 6, 'l and 8 on two shafts I0 and I2 arranged horizontally and at right angles to each other and rotated in unison with a step-bystep or intermittent motion, once during each operation on a shoe, through connections with the operating shaft 4. The shoe supporting jack comprises a frame I4 having shoe supporting means therein and a supporting structure including a horizontal link I6 pivotally connected to the frame and to an upwardly extending substantially vertical arm I8 which, in turn, is supported by a base-2U pivotally mounted upon the frame,-

work 22 A,of the machine to swing about an axis extending transversely to the direction of feed and substantially parallel with the plane of the bottom of a shoe supported on the jack. The pivots connecting the link I6 with the arm I8 and with the jack frame I4 are parallel with the axis of the base 28. The jack frame is thus Supported firmly in position but canv readily be moved to reed the shoe and to impart a pitching or tipping movement to the shoe about an axis extending through the shoe bottom transversely `to the length of the shoe at all times during the operation of the machine. To permit a slight lateral movement of the jack frame during the lasting operation and also aV movement of the jack frame into and out of operative position with relation to the lasting units, the supporting arm I8 is pivotally mounted at its lower end on the base 28 to swing about a horizontal axis at right angles to the pivotal axis of the base in the main machine framework. Feeding movements are imparted progressively and intermittently to the jack frame I4 through connections actuated by the pattern cam 1, including a cam actuated lever 24, a link 26 having its lower end adjustably connectedto the lever 24 in a manner clearly described in Patent No. 2,201,866 and having its upper end connected to a horizontal arm of a bell crank 28 and a link 38 connecting the vertical arm of the bell crank to the jack frame.

During operation of the machine, the jack is continually raised and forced upwardly by means of a relatively long tension spring 32 connected at its lower end to one arm of a lifting lever 34, acting through a jack supporting cord 36 running over suitably located guides and pulleys to .the frame of thejack. During work feed, the pressure of the shoe against the lasting units and the tension of the jack raising spring are increased and alternately diminished and, at the end of the feeding movement are again increased to insure proper staple driving operations ina manner to be described further hereinafter. Prior to the outward movement of the jack at the end of a lasting operation, the force of vthe spring on the jack frame is relieved and the jack lowered away from the lasting units, as in the machine of the said patents, this result being accomplished during the straightening movement of a toggle comprising links 38 and 4|.'l, the latter of which comprises a pair of similar bars, one at each side of the link 38. The lifting lever 34 is fulcrumed on a shaft 35 in the machine framework 22 and the upper link 38 of the toggle is pivoted to the machine framework. The lower link 48 of the toggle is pivoted to a toggle supporting arm 42 carrying a set screw 44 (see Eig. 12) engaging a lug on a second arm of the lever 34. The toggle is flexed more or less during the operation on the shoe as the spring takes up or gives up the chord 36 to which it is connected, the parts of the jack supporting structure being foreshortened vertically as the position of the shoe is changed.

To straighten the toggle and lower the jack at the end of a lasting operation, the toggle link 48 is connected by a link 46 to a cam actuated lever 4B. As the toggle approaches its straightened condition, a link 5D connected to the toggle link 38 forces a slide 52 to which it is pivoted outi wardly through a bearing in the machine base and causes the outer end of the slide to engage a plate 54 on the jack frame I4, thereby forcing the iack outwardly away from its `operating position. While in its outer inoperative position, the

jack is actuated automatically to release the shoe, and a new shoe is substituted manually for one which has been lasted.

To present the shoe properly to the lasting units during lasting operations, it is desirable to tip the shoe with an endwise pitching movement and with a widthwise rocking or rolling movement. The rolling movement is provided for in the patented machine by securing the shoe supporting means in a cradle, similar to that indicated at 58, having pivotal mountings 58 on the frame I4, the axis of which mountings passes through the shoe bottom lengthwise of the shoe. During lasting operations, the cradle is shifted in the jack frame to insure proper positioning movements of the shoe. The construction and operation of the cradle in its pivotal mountings in the present machine are similar to those in the patented machine.

The tipping or pitching movement of the shoe in the patented machine is centered about an axis passing through the bottom of the shoe at the point of operation of the lasting units 2 determined by abutments comprising a pair of presser feet 68 acting at opposite marginal portions of the shoe and engaging the insole of the shoe indicated at B2 on a last 63 inside the ribs of the insole.

With shoes having relatively flat bottom surfaces, such as are encountered in the ordinary run of mens styles, the construction and design of the jack actuating mechanism and cams in the patented machine are adequate to produce the desired positioning movements. With higharch shoes styled for womens wear, relatively abrupt curvatures are met, particularly along the ball portion of the shoe, so that the extent and rapidity of movements required in tipping the shoe may impart excessive strain on the jack actuating mechanism, Also, the cams required for producing the resulting pitching movement necessarily have their active surfaces formed with excessively hard inclinations where tipping or pitching movements are rapid or excessive. In some instances, the Vertical foreshortening of the jack parts as the result of tipping or pitching the shoe is so great as to reduce below a desirable minimum the pressure exerted by spring 32 on the jack so that the shoe may not be held effectively in operating position against the presser feet 68.

In order to avoid these difficulties and to impari; the proper tipping or pitching movement to a womans style shoe having a relatively high arch, according to the present invention, the shoe supporting means is not mounted directly in the cradle 56 but upon a separate carriage 84 which in turn is mounted in the cradle 56 for arcuate tipping or pitching movement, thus avoiding the necessity of tipping the `iack frame While operating upon high-arch shoes to the full extent required by the curvature of a shoe bottom. With the use of a separate carriage, substantially the same shape may be employed in the pattern cam 8 for producing the pitching movement of the jack frame with womens shoes as is used with mens shoes by introducing the excess of pitching movement required in womens shoes through tipping of the carriage only. With mens shoes, the carriage may be locked in position in the jack frame throughout the operation so as to be held immovable `with relation to the cradle.

The carriage 64 is formed with two pairs of oppositely disposed slots 66 of arcuate shape having a curvature centered about an axis, indicated at 68, passing through the ball portion of a shoe on the carriage, a short distance beneath the bottom surface of the shoe. Fitting within the slots are two pairs of alined rolls 61 (see Fig. 5) rotating on stub shafts 69 `projecting toward each other from the cradle 56. With different sizes of shoes, necessarily there will be some Variation in the location of the pitching axis, but the arrangement is such that the axis 88 passes through shoes of various sizes at locations generally concentric with the curvature of the ball portion of the shoe. When located in this manner, a substantially uniform pitching movement in the carriage is suitable for proper presentation of the shoe to the lasting units, and all sizes of shoes with a particular style have been found to effectively be operated upon.

The mechanism for actuating the carriage in the cradle is driven from a cam shaft 18 in the jack frame I4, the cam shaft being in turn rotated somewhat less than 90 during the lasting operation and then reversed to starting position through suitably connected cords 12, arrangedand actuated as more fully described in inventors Patent No. 2,201,866. Since the extent for pitching movements required is greater at the ball portion of a shoe than during operation along the forepart where little or no pitching movement is required, the actuating connections between the cam shaft and the carriage 64 are arranged to be locked and disconnected during lasting operations along the forepart of a shoe and to be unlocked and connected together for operation only along the ball portion and shank of the shoe, An important advantage gained by disconnecting and locking the carriage pitching mechanism results not only from securing the carriage firmly in position while operating upon the relatively flat forepart of a shoe but also by avoiding the necessity of imparting a reverse movement to the carriage While the cam shaft 18 is being reversed at the end of a lasting operation. The shaft 18k-also carries a cam 1| (Figs. 1 and '7) which acts upon a lever 13 to cause the cradle 56 to be shifted in the jack frame, as in the patented machine.

The disconnectible connections between the shoe pitching or tipping carriage and the cam shaft 18 in the jack frame include a link 14 connected at its upper end by a universal joint to the carriage 64 near the toe of the shoe supported thereon and by a similar joint at its lower end to .the longer arm of a double lever 16, forming a carriage actuator fulcrumed on a pin 18 mounted at its ends in the side flanges of the jack frame I4. The arms of lever 'I6 are disposed substantially at right angles to each other, the shorter one being pivotally connected at 1S to a link 88 acting, together with a link 82, as a toggle for locking the actuator lever 16 while Operating upon the forepart of the shoe. The actuator lever is constructed with two similar parts spaced from each other with a hub of the link 80 between them at the end of the shorter arm. To prevent the locking toggle from moving past straightened position, the link 88 has a downwardly extending lug for engaging the inner surface of the link 82 when the pivots of the toggle are brought into alinement. The link 82 of the toggle has a hub rotatablev on a pin 84 in the jack frame, the parts being so arranged that, when the toggle is straightened, the carriage 64 is held immovable in the cradle 56 (Figs. 3 and 5). When the locking toggle is broken, the actuator lever 16 is connected with one arm of a cam lever 86 fulcrumed on the pin 84 and pro- V|88 is retained yieldingly vided on its other arm with a cam roll (Fig. 4) engaging a suitably shaped cam slot cut in a cam plate 88 (see Fig. 7) secured to a disk 98 keyed to a sleeve 92 on the cam shaft 18, the shape of the cam slot being indicated by the dotdash line of Figs. 2 and 5. The cam plate 88 is shaped with a bulge to impart suitable movements to the carriage actuator lever 16 for preventing the shoe properly to the lasting units during operation along the ball portion of the shoe in the jack. During the remainder of each operation upon a shoe, the cam roll on the lever 86 is engaged by a portion of the cam slot in the plate 88 which is concentric with the cam shaft, so that no movement is imparted to the cam lever.

The disconnectible element of the carriage actuating connections consists of a hooked link 94 mounted on the pivot 19 between the parts of the actuator lever 16 and arranged with its hooked end to engage a pin 96 xed in one arm of the cam lever 86 as best shown in Figs. 1.0, 1l and 12.

In actual practice, it has been found that the curvature along the ball portion of a womans shoe throughout the normal range of shoe sizes of a particular style is substantially the same. For this reason, the shape of the slot in cam plate 88 is suitable for imparting pitching movement to all sizes in at least one style of shoe and in many other styles of similar nature.

When the hooked link 94 is disengaged from the pin 96, the locking toggle 80, 82 is held in straightened condition by a spring 98 coiled about the hub of the toggle link 88 on the pin 19, one end of the spring acting against a projection carried by the toggle link 88 and the other end against the hub of a controller |88, more fully described hereinafter, rotatably mounted on the pin 18. 'I'he hooked link is arranged to be held either in engagement with or disengaged from the pin 96 by frictional lforce exerted by a flat spring |82 surrounding at one end a hub of the hooked link 94 and formed with a grooved free end to engage frictionally with the end surface of the pin 96 while the link 94 is hooked thereto. To insure that the flat spring |82 will move with the hooked link, it is riveted along its middle portion to the link. The spring |02 is constructed to exert a pressure at its free end against the hooked portion of the link 94 and is disposed to press frictionally against the end surface of the pin 96, thus holding the hooked link in engagement with the pin.

The controller |88 for the hooked link 94 consists 0f a lever formed with crossheads at its ends rotatably mounted on the pivot pin 18 for the actuator lever 16. 'I'he cross-heads of the controller lever are disposed to engage the outwardly projecting tail of the hooked link 94 in one position of the controller and the hooked portion of the link in the other extreme position of the controller. The left-hand crosshead on the controller is provided with an elongated slot within which projects a stud |84 carried by a controller shifting arm |86 rotatable about the pin 18. The shifting arm |86 is actuated by a crank rotating with the cam shaft 18 which is so timed that, when the toggle 88, 82 is moved to alined position to lock the carriage actuator lever 16, the arm |86 will shift the controller against the tail of the hooked link 94 and disengage it from the pin 96. The controller lever in uniform angular relation with the arm 86 through a spring |88 connecting the controller with the arm, thereby 9 holding the controller with the upper end of the slot against the stud |04. When the arm |06 is moved in the opposite direction, the controller presses against the hooked portion of the link 94 and engages it with the pin 96 if the pin is in a position to be received by the hooked portion of the link 94. If the pin 96 is out of alinetment with the hooked portion of the link 94, the pin may engage an extension of the link and ride along the under surface of the link until proper alinement is reached. During this time, the angular relation of the controller and arm |06 will be changed, the spring |08 expanding sufficiently to enable the slotted crosshead of the controller to be moved yieldingly through the length of the slot. As soon as the pin comes into alinement with the hooked portion of the link 94, the spring |08 will press the hooked link into connecting position. The crank on the cam shaft 'l0 for actuating the controller shifting arm |06 comprises a bolt threaded into one side of the disk 90, passing loosely through a pitman I |2 having its crank engaging end curved about the cam shaft and its outer end pivotally connected at ||4 to the arm |06.

To break alinernent of the toggle links 80, 82 before the lever 86 begins to move, the disk 90 has bolted to one side a radially projecting arm I6, best shown in Fig. 8, upon which is pivotally mounted a latch H8. The latch H8 is located to engage an inwardly, extending finger portion of the link 82 at a time just before the roll on the cam lever 86 enters anV active portion of its cam slot; Continued rotation of the cam shaft and disk 90, after theY latch H8 engages the link 62, moves the toggle toward broken position and unlocks the actuator lever 16. The latch ||8 is arranged to yield upon engagement with the link 82 during reverse rotation of the cam shaft, a tension spring being connected between a tail on the latch and an anchor pin on the disk 90K To maintain the latch in idle position when disengaged from the link 82, a stop pin |2| is mounted in the arm to limit the movement of the latch by the spring |20. After the cam roll has passed through the active portion of the cam slot in the plate 88, the actuator lever I6 is returned to its starting position, and the toggle 60, 62 is brought into locking alinement, being heldin this position by the spring 98.

During the return rotation of the cam shaft 10 from the position of Fig. 3 to its starting position of Fig, 5, in readiness for a new operation, the toggle 88, 82 remains straightened, thus locking the carriage actuating connections, and the hooked link 94 remains disengaged from the pin 96 with the actuating connections thus disconnected. An important advantage of this mode of operation results in saving time and reducing the strain on the operating connections in moving the relatively heavy shoe carriage and shoe supporting parts. With the connections disengaged, no resistance is offered by the weight of'the parts actuated, so that a relatively rapid return movement-can be accomplished. Rotation of the cam shaft 10 is utilized also to release the shoe from the jack and reset the jack in readiness'for the receptionof a new shoe.

For supporting and clamping the shoe in the carriage 64, the carriage has a toe rest and a heel support or post. The toe rest is mounted .at the right end of the carriage and comprises a Curved chute |22. The heel support corn-prises a last pin |24 slidably mounted for movement on the carriage toward and from the chute. The last pin 10 |24 is mounted on a `post |25 projecting` from a slide |26 movable along a guideway |28 in the carriage, a shoe clamping spring |30 being stretched between the slide and the right end of the guideway to force a shoe in which the last pin is inserted toward the toe rest chute. To simplify the construction, the chute |22 is not pivotally mounted on the toe end ofthe jack as is the chute in inventors Patent No. 2,252,325 but is xedly secured by an angle bracket |32 to the toe rest end of the shoe carriage. The guidevvay |28 in the' carriage is inclined at an angle to the length of the last pin |24 so that, with small sizes of shoes, the last pin as it moves toward the toe rest will rise progressively to a higher level with respect thereto in compensation ofthe lower heights of last.

To prevent displacement of the shoe and to locate the extreme end of a shoe on the jack as the last pin clamps the shoe against thev toe rest, the

` toe rest is provided with a toe end gage |34 in the form of a plate screwed to the toe rest portion of the carriage and bent at its upper end with itstoe end engaging surface substantially at right angles to the length of the last pin guideway |28. By this arrangement, the upward component of force imparted to the shoe by the last pin spring |30 acting in the direction of the guideway |28 is resisted at the toe of the shoe and there is no tendency to force the shoe upwardly away from the toe rest chute |22,

The connections between the cam lshaft 10 and the last pin supporting slide |26 for unclamping and releasing the shoe are similar to those disclosed in inventors Patent No. 2,252,325 except for minor details of construction. Briefly, the

unclamping connections include a link |36 connected at one end to the crank actuated pivot H4 and at its other end with an operating lever V|38 rotatably mounted Von a Shaft |40 secured in the jack frame. Also rotatable on the shaft |48 and releasably. connected to the operating lever |38V is a segmental unclamping. and resetting lever |42 arranged at its upper end to receive slidingly a flexible cable |44 vconnected with the last pin slide |26.V The cable |44 has at its resetting lever engaging end a ixedblock |46 against which the resetting lever acts. The use of a eXible cable in place of` a rigid link, such as is employed in the machine of the patent last referred to, enables the cradle and carriage tomove freely with respect to the jack frame during lasting operations without resistance such as might be encountered in the patented construction. While the carriage is being tipped about` the ball portion of a shoe .during lasting operations, the .cable slides through the resetting lever in the manner indicated in Fig. 2.

To connect the operating lever |38 releasably with the resetting lever |42, the lever |38 has pivoted thereon alatch lever |48 the hooked end of which is movabletoward and from engagement With a pin |50 on the resetting lever. At the end of a lasting operatiom the latch` supporting and operating lever |38 is moved toward the resetting lever- `to engage the-latch lever with the pin |50. For .urging the latch lever ,against the pin, the latch lever is connected with a coil spring |52 stretched between the latch lever and a fas.- tening on the operating lever |38. At the end of the lasting operation, the c arn shaft l0 is reversed to bring the connected mechanisms to starting posi-tion and, `during the reverse rotation, the latch lever |48 draws the resetting lever with lit and, through the .cable |44, unclamps the shoe and resets the last pin 'slide |26 in a position to receive a new shoe.

In the machine of inventors said prior patents, the last pin on the shoe supporting means is slidingly and yieldingly mounted for vertical movement in the last pin slide When a shoe is applied to the jack, downward pressure applied to the bottom of the shoe engaging the last pin causes the last pin slide to be released for movement toward the toe rest, the last pin being arranged when depressed to release the last pin slide for shoe clamping movement toward the toe rest. Due to the mounting of the cradle in the jack frame and the general arrangement of the jack in the patented machine, dimculty has been encountered in some cases in actuating the last pin to release the last pin slide for clamping a shoe in operating position and, in the present construction, with a movable carriage in addition to the cradle, further complication in the slide releasing connection would arise unless special provision were made for avoiding this difficulty.

To release the last pin slide |26 for shoe clamping movement toward the toe rest, in the present illustrated jack, the releasing operation is made entirely independent of the last pin |24, the lastV pin being rigidly secured in the last pin slide, and a, tripping lever |54 is provided having a handle portion |56 located in line with the axis about which the cradle is mounted for rolling movement of the shoe in the jack frame. The tripping l`ever is fulcrumed on a pin |58 in the jack frame, and one arm of the lever engages an arm of an intermediate lever |60 also fulcrumed on the jack frame. The intermediate lever has an arm engag ing the latch lever |48 so that, when the tripping lever is actuated toward the adjacent pivotal mounting 58 for the cradle (see Fig. 5), the latch lever will be disengaged from the pin on the resetting lever |42. As soon as the latch lever is disengaged from the pin on the resetting lever, the last pin slide moves toward the toe rest to clamp the shoe, the spring |30 shifting the slide until the movement is arrested by engagement of the toe of the shoe with the toe end gage |34. To hold the tripping lever in non-tripping position, the hubs of the tripping lever and the intermediate lever have coiled about them torsion springs |62 and |64, respectively, acting toV press the lower end of the tripping lever against a pin |66 in the jack frame.

In straightening the toggle for lowering the jack at the end of the lasting operation in the patented machine, it is necessary to overcome the full force of the jack raising spring corresponding to the spring 32 in the present machine, this spring being constructed with sufcient mechanical strength to balance the weights of the jack and shoe and also to'apply a force required to maintain proper upward pressure of the shoe against the presser feet 60 of thelasting units. The cam for actuating thetoggle straightening and jack lowering lever 48 is of necessity cut with a sharp rise acting at the extreme end of the lasting operation on a shoe. As a result, the toggle is straightened more rapidly than'the jack parts will drop, by reason of their weight, away from the lasting units. Due to the straightening of the toggle, the jack raising cord 36, therefore, is slackened and, as soon as the jack parts drop to the limit of the slackness in the cord, a severe shock will be imparted to the cord with'consequent undesirable reactions in the toggle and the jack parts themselves. To avoid the results of reaction in the toggle after being straightened, in the machine of inventors Patent No.` 2,247,443, a'dashpot is pro-A vided arranged to resist movement of the toggle as it nears straightened position, thereby reducing the speed at which the toggle is straightened and absorbing the shock occasioned by reaction of the heavy jack parts when they reach the limit of their lowering movement.

A's has been stated, a feature of the present invention consists in the use of weight counterbalancing means to enable the jack to descend for a short distance relatively slowly even though the toggle 38, 40 is straightened quickly, without subjecting the toggle to undesirable shock and jar. Instead of utilizing the spring 32 in the present illustrated machine to support and raise the jack as well as to force the shoe against the presser feet 60, a substantial proportion of the weight of the jack and shoe is taken up in the present machine by a jack weight counterbalancing spring |68 stretched between a bar |10 in the machine framework Yat the upper end of the spring and an arm |12 at its lower end pivotally mounted at |15 on an arm of thelever 34 (see Fig. 12). The force of the spring |68 is adjusted suitably to balance the weight of the jack and shoe substantially except for a few ounces of excess weight in the jack. The lowering movement of the jack, therefore, is effected by a slight excess of weight in the jack and supported shoe over the force applied by the counterbalancing spring |68. Being of a relatively heavy construction, the excess or uncounterbalanced portion of the weight of the jack over the force of the counterbalancing spring is only slightly greater than that necessary to overcome friction in the parts, thus causing the jack to settle gradually to the lower limit of its movement. Under these conditions, the speed at which'` the jack descends after the toggle is straightened is less than that of the lever 34 and a substantial amount of separation occurs between the lever and the arm |12, as illustrated in the broken-line position of Fig. 1. The downward movement of the arm |12 thereafter will not produce undesirable shock or reaction on the toggle, on the cord 36 or on the jack parts themselves when the jack reaches the lower limit of its movement because the settling movement is so gradual.

vTo regulate the lower limit of the .lack movement, the arm |12 carries a set screw |14 acting as a stop against the lever 34. The arrangement between the arm |12 and the lever 34 comprises a loose joint in the jack raising and shoe pressing system of connections which prevents formation of slack in the jack raising cord 36, the counterbalancing spring |68 acting at all times to maintain tension in the cord so as to keep it under control and prevent its displacement from the various guides and pulleys over which it passes.

As a means for holding the two members of the toggle 38, 40 in alinement after the toggle has been straightened, the toggle connected arm of the lever 34 has fastened to it a spring |16 stretched between the arm and an eye on the machine framework. The purpose of the spring |16 is to insure application of a light pressure on the toggle after being straightened even though the force of the jack raising spring 32 is substantially relaxed.

Since the jack raising spring 32 no longer is required to support the entire weight of the jack and shoe, a, relatively weaker spring may be employed in this position than in the patented machine and no change in its tension is required.

The mechanism for controlling the tension of the jack raising spring to increase during lasting operations and alternately to diminish the tension during that part of the cycle of operations in which the shoe is fed, therefore, is not subject to such severe strains and may be arranged more conveniently for adjustment purposes and accuracy of timing.

The means for "increasing and diminishing the pressure ofthe shoe against the presser feet of the lasting units and the tension of the jack raising spring 32 during action of the staple driving devices in the lasting units in the present machine comprises a single lever |18 fulcrumed on a shaft |80 in the upper part of the machine framework and provided with a cam roll. |82 engaginga cam |84 onV the main operating cam shaft 4. The lever |18 is directly connected with the upper end of the spring 32 so that no lost motion occurs between the lever and the spring, and the increase of spring pressure is applied accurately in each lasting cycle at the time in which it is desired. Since the full weight of the jack is no longer supported by this mechanism, much simpler and lighter operating connections and parts'may be employed than in the patented machine.

The nature and scope of the invention having been indicated and an embodiment of the several'features of the invention having been specilically described, what is claimed is:

l; A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a cradle for the shoe` supporting means, and a movable jack frame in which the cradle is pivotally mounted for rolling movement ofthe shoe in the supporting means about an axis extending lengthwise of the shoe, in combination with a carriage vin which the shoe supporting means is secured mounted in the cradle for pitching movement ofthe shoeabout an axis extending widthwise of the shoe in the supportingmeans.

2. A machine for use in the manufacture of shoes having devices actingv along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a cradle for the shoe supporting means, and a movable jack frame in which the cradle is pivotally mounted for rolling movement of the shoe in the supporting means about an axis extending lengthwise of the shoe, in combination with a carriage in which the shoe supporting means is secured mounted in the cradle for pitching movement of the shoe about an axis extending widthwise of the shoe in the supporting means, and mechanism in the jack frame for actuating the carriage relatively to the cradle during operation of said devices.

3. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a cradle for the shoe supporting` means, and a movable jack frame in which the cradle is pivotally mounted for rolling movement of the shoe in theV supporting means about an axis extending lengthwise of the shoe, in conibination with a carriage in which the shoe supporting means is secured mounted in the cradle for pitching movement of the shoe about an axis extending widthwise of the shoe in the suppcrrting means, a cam shaft in the jack frame, and mechanisms driven from the cam shaft `for shift- 14' ing the cradle in the frame and for actuating the carriage relatively to the cradle during operation of said devices. y

4. A machine for use in the manufacture of shoes having devices'acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a cradle for the shoe supporting means, and a jack frame in which the cradle is pivotally mounted` for rolling movement of the shoe in the supporting means about an axis extendingV lengthwise of the shoe, in combination with a carriage in which the shoe supporting means is secured mounted in the cradle for pitching movement of the shoe about an axis extending widthwise of the shoe in the supporting means, a cam shaft in Jche frame, mechanism including disconnectible connections driven from the cam shaft for actuating the carriage relatively to the cradle, and means for connecting said connections during operation of said devices and for disconnecting and locking said connections thereafter.

5. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a cradle for the shoe supporting means, and a jack frame in which the cradle is pivotally mounted for rolling movement of the shoe in the supporting means about an aXis extending lengthwise of the shoe, in combination with a` carriage in which the shoe supporting means issecured mounted in the cradle for pitching movement of the shoe about an axis extending widthwise of the shoe in the supporting means, a cam shaft in the frame, mechanism including disconnectible connections driven from the cam shaft for actuating the carriage in the cradle, and a crank driven by the cam shaft for causing thedisconnectible connections to be connected during one part of the cam shaft rotation and for causing said connections to be disconnected and the carriage locked during another part of the cam shaft rotation.

6. A machine for use in the manufacture of shoeshaving devices acting along the marginal portionlof a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a carriage in which the shoe supporting means is secured, a jack frame in which the carriage Iis movably mounted, and a cam shaft in the frame, in combination with mechanism including a hookedlink and a cooperating pin driven from the cam shaft for imparting movement to the carriage in the frame, a crank driven from the cam shaft for engaging or disengaging theghook and pin to render the mechanism operative or inoperative, a toggle for locking the mechanism from operation when the hooked link is disengaged from the pin, an arm on the cam shaft, and a latch on the arm, acting when the hooked link is being engaged with the pin to break the locking toggle.

7. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a, Shoe bottom to performan operation progressively along the shoe, shoe supporting` means, a cradle for the shoe supporting means, and a jack frame in which the cradle is pivotally mounted for rolling movement of the shoe. in the supporting means about an axis extending lengthwise of the shoe, a cam shaft in the frame, means for rotating the camshaft in one direction during operation of the said devices` and for rotating the cam shaft in the opposite direction after the operation is completed, and a cam on the cam shaft for shifting the cradle relatively to the frame during operation of said devices, in combination with a carriage in which the shoe supporting means is secured mounted on the cradle, mechanism including disconnectible connections driven from the cam shaft for actuating the carriage in the cradle, and means for connecting the disconnectible connections during a substantial part of the operation of said devices and for disconnecting and locking said carrlage connections thereafter.

8. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, a, carriage, a jack frame in which the carriage is movably mounted, a cam shaft in the frame, clamping means mounted on the carriage comprising a toe rest, a heel support, a slide on which the heel support is mounted, a spring tending to move the slide toward the toe rest to clamp a shoe, and means in the jack frame for unclamping the shoe, in combination with a flexible cable stretched between the heel support slide and the unclamping means to render the unclamping means operative. l

'9. A machine for use in the manufacture of high arch shoes, having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, shoe supporting means, a jack frame for the supporting means, and means for imparting a feeding movement to the jack frame lengthwise of the shoe on the supporting means, in combination with a carriage on which the shoe supporting means is mounted guided in the frame for pitching movement about an axis extending widthwise of the shoe on the supporting means and intersecting the shoe close to the ball line of the shoe, and mechanism actuated in timed relation with the feeding means for imparting pitching movement to the carriage in opposite directions to enable Operations to be performed along the shoe at either side of the ball line while presenting ,the bottom of the shoe at the point of operation substantially at right angles to the operating devices.

10. A machine for use in the manufacture of high arch shoes, having'devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe,` shoe supporting means, a jack frame for the supporting means, and means for imparting a feeding movef ment to the jack frame lengthwise o'f the shoe on the supporting means, in combination with a carriage on which the shoe supporting means is mounted, and means for guiding the carriage in the frame comprising rolls and an arcuate guideway centered about an axis extending widthwise of the shoe on the supporting means and intersecting the shoe substantially at the center of its lengthwise curvature at the ball line of the shoe.

11. A machine for use in the manufacture of shoes', having a jack frame, shoe supporting means in the jack frame, devices for operating upon a shoe including an abutment to engage the shoe, means for pressing a shoe on the supporting means yieldingly against the abutment, means for feeding the jack frame step by step to present the shoe progressively in different relations to the abutment, and a shaft for actuating the operating devices, in combination with a cam on said shaft for controlling the pressing 16 means to diminish the pressure of the shoe on the abutment While the shoe is being fed.

12. A machine for use in the manufacture of shoes, having a jack frame, shoe supporting means in the jack frame, devices for operating upon a shoe including an abutment to engage the shoe, means for pressing a shoe on the supporting means yieldingly against the abutment, means for feeding the jack frame step by step to present the shoe progressively in different relations to the abutment, a shaft for actuating the operating devices, and a pattern cam shaft for the feeding means driven intermittently from the operating shaft and arranged to rotate once during operation upon each shoe, in combination with a cam on the operating shaft for controlling the pressing means to diminish the pressure of the shoe on the abutment while the pattern cam shaft is being rotated to feed the shoe and to increase the pressure while the operating devices are being actuated.

13. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom for performing an operation progressively along the shoe, a jack frame, a cradle in the frame, shoe supporting and releasable clamping means on the cradle, and mounting means for the cradle in the jack frame to enable the cradle to roll about an axis extending lengthwise of the shoe in the supporting means, in combination with a tripping lever for the shoe clamping means in the jack frame having a handle portion located in line with the axis about which the cradle rolls in the frame.

14. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom for performing an operation progressively along the shoe, a jack frame, a cradle in the frame, shoe supporting and releasable clamping means on the cradle, mounting means for the cradle in the jack frame to enable the cradle to roll about an axis extending lengthwise of the shoe in the supporting means. and mechanism in the jack frame for actuating the shoe clamping means to unclamp the shoe, in combination with a tripping leverl for the shoe clamping means in the jack frame for causing the shoe clamping mechanism to clamp the shoe.

15. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a shoe bottom for performing an operation progressively along the shoe, a jack frame, a cradle in the frame, shoe supporting and releasable clamping means on the cradle, and mounting means for the cradle in the jack frame to enable the cradle to roll about an axis extending lengthwise of the shoe in the supporting means, in combination with mechanism in the frame for actuating the shoe clamping means comprising a resetting lever mounted in the frame, power driven means for moving the resetting lever, a latch for holding the resetting lever releasably in shoe unclamping position, and a flexible cable connecting the resetting lever with the clamping means.

16. A machine for use in the manufacture of shoes having devices acting along the marginal portion of a, shoe bottom for performing an operation progressively along the shoe, a jack frame, a cradle in the frame, shoe supporting and releasable clamping means on the cradle, and mounting means for the cradle in the jack frame to enable the cradle to roll about an axis extending lengthwise of the shoe in the supporting 1-2'v means, in combination with mechanism in the frame `for actuating thev shoe clamping means comprising Ia resetting lever mounted in the frame, a connection between the clamping means and the resettmg 1ever, ,a latch for releasably holding the resetting lever in clamp resetting position, a supporting lever on which the latch isrpivotalilxy mounted, a power `driven member for Vmoving 4the support-ing lever `to engage Athe latch with ythe resetting lever yand to imovethe resetting fever toreset the clamping meansl `and a handlein the jack fr-ame 4for releasingthe resetting lever from the latch to clamp a shoe.

17. A machine for use in the manufacture of shoes, having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, a jack frame, shoe supporting means on the frame, comprising a last pin and a toe rest, a slide on which the last pin is mounted, a guideway inclined to the length of the last pin in the shoe supporting means to permit; shoe clamping movement of the slide toward the toe rest, a spring for moving the slide toward the toe rest, and means for holding the slide releasably away from the'toe rest before jacking a shoe, in combination with a toe gage having a toe end engaging surface disposed at right angles to the guideway for the last pin slide to avoid a component of force from the spring tending to force the toe of the shoe upwardly away from the toe rest.

18.A machine for use in the manufacture of shoes, having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, an operating cam shaft, connections for actuating said devices from the cam shaft, a shoe supporting jack, means including a spring exerting upward pressure on the jack to press the shoe toward said devices, a toggle connected and arranged to be flexed during movements of the jack, and a pattern cam acting at the completion of the operation to straighten the toggle and thereby render the spring inoperative to press the shoe against said devices, in combination with means separate from the spring for counterbalancing a substantial portion of the weight of the jack, and a loose joint in the shoe pressing means to enable the toggle to be straightened quickly without subjecting the toggle to reaction due to the full force of the jack weight, the shoe thereon moving relatively slowly away from operating position against said devices under the force of the remaining uncounterbalanced portion of the jack weight.

19. A machine for use in the manufacture of shoes, having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, an operating cam shaft, connections for actuating said devices from the cam shaft, a shoe supporting jack, means including a spring exerting upward pressure on the jack to press the shoe toward said devices, a toggle connected and arranged to be flexed during movements of the jack, and a pattern cam acting at the completion of the operation to straighten the toggle and thereby render the spring inoperative tc press the shoe against said devices, in combination with means separate from the spring for counterbalancing a substantial portion of the weight of the jack, a loose joint in the shoe pressing means to enable the toggle t be straightened quickly without subjecting the toggle to reaction due to the full force of the jack weight, the shoe thereon mov- 18 :relatively slewly awla'iy from' operating posi tion against said devices under the force of the remaining uncounterbalancedportion of the jack weight, and 'aAs'pr-ing' the pressing means -actin-g between the toggle and the loose joint to :hold: ti'lietoggle in straightened position when temporarily 'freed-frornme-weight of the jack.

20. A machine .for use the manufacture of shoes, havingldevices acting along the marginal portionlof a shoe'bottom to perfor-m an operation progressively along `the. shoe, an operat ingcamshaftycornections for actuating said devices from the cam shaft, a shoe supporting jack, a cable connected to the jack for transmitting force to press the shoe toward the operation performing devices, a lever connected to the cable, yielding means acting on the lever to counterbalance a substantial portion of the weight of the jack, an arm acting against the lever to move the lever in a direction for lowering the jack away from operating position, a toggle connected to the arm for holding the jack in lowered position and arranged to be flexed during movements of the jack in its upper position, and a pattern cam acting at the completion of the operation to straighten the toggle, in combination with a spring connected to the lever to exert upward pressure on the jack which, added to the force of the counterbalancing means, holds the shoe on the jack forcibly against the operation performing devices.

21. A machine for use in the manufacture of shoes, having devices acting along the marginal portion of a shoe bottom to perform an operation progressively along the shoe, an operating cam shaft, a shoe supporting jack, a toggle connected to the jack and arranged to be flexed during movements of the jack, and a pattern cam acting at the completion of the operation on a shoe to straighten the toggle, in combination with a jack lifting lever, a spring connected to the jack lifting lever for exerting upward force on the jack to press the shoe against the operation performing devices, an arm arranged for limited movement toward and from the lever, a cable connected to the arm, yielding means acting on the arm separately from the pressure exerting spring for counterbalancing a substantial portion of the weight of the jack, and a second arm having a connection with one end of the toggle and acting against the lifting lever to slacken the cable.

22. A machine for use in the manufacture of shoes, having a jack frame, shoe-supporting means in the jack frame, devices for operating upon a shoe including an abutment to engage the shoe, and means for feeding the jack frame step by step to present the shoe progressively in different relations to the abutment, in combination with means for pressing the shoe on the supporting means against the abutment comprising two yielding members, one of which substantially balances the weight of the jack and shoe and the other of which is actuated alternately to force the shoe against the abutment and to diminish the pressure on the abutment during feed of the shoe.

23. A machine for use in the manufacture of shoes, having a jack frame, shoe-supporting means in the jack frame, devices for operating upon a shoe including an abutment to engage the shoe, and means for feeding the jack frame step by step to present the shoe progressively in diiferent relations to the abutment, in combination with means for pressing the shoe on the 19 supporting means against the abutment comprising two separate yielding members, one of which substantially balances the weight of the jack and shoe and the other of which forces the shoe against the abutment, and mechanism for 5 increasing during operation of said devices the tension of the member which forces the shoe against the abutment and alternately for diminishing the tension of said member during feed of the shoe while the tension on the other 10 member remains unchanged.

ROBERT H. LAWSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,743,199 Eppler Jan. 14, 1930 1,854,204 Lawson Apr. 19, 1932 1,999,298 Lawson Apr. 30, 1935 2,252,325 Lawson Aug. 12, 1941 2,201,866 Lawson May 21, 1940 

